{"instruction": "You are an expert in event argument extraction. Please extract event arguments and their roles from the input that conform to the schema definition, which already includes event trigger words. If an argument does not exist, return NAN or an empty dictionary. Please respond in the format of a JSON string.", "schema": [{"event_type": "patch vulnerability", "arguments": ["vulnerable system", "vulnerable system version", "releaser", "patch number", "patch", "issues addressed", "time"]}], "input": "Uncovered by researchers in the Security and Privacy Group at the University of Birmingham , the vulnerability allows an attacker who is on the same network as the victim to perform a man - in - the - middle attack and steal information ."}
{"patch vulnerability": []}